Rank 53 documents Deep Impact — the Discovery Program mission that released a 370 kg copper impactor into the path of Comet Tempel 1 and watched the collision from a flyby bus 500 km away. Launched 12 January 2005 aboard a Delta II, the dual-spacecraft stack separated before encounter; the impactor's targeting camera returned images until seconds before impact on 4 July 2005, when the copper mass struck the nucleus at 10.2 km/s, excavating a crater and producing an ejecta plume bright enough to saturate imagers. Flyby observations measured plume composition and crater evolution — the first deliberate glimpse of a comet's interior material. The bus later flew as EPOXI, visiting Hartley 2 in 2010 before contact loss in 2013. Stardust NExT would revisit Tempel 1 in 2011 to image the impact site. Wallimilist renders the flyby bus with dish and solar panels, Tempel 1 nucleus with impact flash, orbital ellipse, and vertical DEEP IMPACT margin type exactly as the master PNG dictates — 2005 comet palette, Independence Day kicker, and curator copy on comet-interior science.